Chap 2: Real Numbers - Spot the Common Mistakes (III)

Revision Exercise 2 (p52 of Textbook) No. 7(c)

11 comments:

  1. 9/5 should be changed to 5/9 instead of changing 18 to 1/18.

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  2. This comment has been removed by the author.

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  3. -1/18x9/5 should be
    -1/18x5/9 as the number behind should be flipped over,so the answer is -10

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  4. When dividing the fractions, the 2nd fraction in the working should be inverted, (numerator become denominator and denominator becomes numerator ). Thus the ans becomes 10.

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  5. instead of 1/18 divided by 9/5, it should be 18/1 divided by 5/9 as when we flip the fraction around, we should always flip the number behind. so the answer is 2/5.

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  6. It should be (7/2 x (-36/7))/(9/5)
    =18/(9/5)
    =18/1.8
    =10

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  7. 9/5 must be swapped instead of 18.

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  8. instead of:
    =(-18)/(9/5)
    =1/18/(9/5)

    it should be...
    =(-18)/(9/5)
    =(-18)/(5/9)

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  9. Instead of...
    ...
    (-18)/ 9/5
    =(-1/18) x (9/5)

    It should be...
    ...
    (-18)/ 9/5
    =(-18) x 5/9

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  10. This is how it should be.

    (-18)x 5/9
    =-10

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